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I am in the process of developing a system to determine an T&F athlete's
foot position along the run-way using a single panning camera. The system
would be used for competition analysis and hence will be non-invasive in
nature (ie. can not have any markings on the runway during competition).
The system will have to be able to accurately calculate the foot position
along the length of the runway irrespective of where the foot lands along
the width of the run-way. Panning angle information would be available via
a potentiometer in the tripod which can be pre-calibrated with markers on
the runway prior to competition. I am looking for an 2D algorithm or method
of calibration to define the object space along the length of the runway so
that the angle information from the tripod and digitised coordinates of the
foot can be combined with the previously collected calibration file. The
only 2D panning algorithm that I can find is from Chow, J. (International
Journal of Sport Biomechanics: 1987, Vol 3. pp.110-127), although this
requires markers along the runway during competition. I am also aware of
systems using an instrumented tripod to provide real-time analysis (such as
used in swimming at the Australian Institute of Sport), however, these
require the athlete to be directly in the centre of the screen during the
whole pan. I have also searched through the Biomech-L archives for 2D
panning algorithms with no success. Any assistance would be greatly
appreciated. The address for replies is alyttle@wais.org.au and I will post
a summary of replies.
Many Thanks, Andrew Lyttle
Andrew Lyttle
Sports Biomechanist
Western Australian Institute of Sport
Stephenson Ave, Mt Claremont WA 6910
Tel: (08) 9387 8166
Fax: (08) 9383 7344
Email: alyttle@wais.org.au
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foot position along the run-way using a single panning camera. The system
would be used for competition analysis and hence will be non-invasive in
nature (ie. can not have any markings on the runway during competition).
The system will have to be able to accurately calculate the foot position
along the length of the runway irrespective of where the foot lands along
the width of the run-way. Panning angle information would be available via
a potentiometer in the tripod which can be pre-calibrated with markers on
the runway prior to competition. I am looking for an 2D algorithm or method
of calibration to define the object space along the length of the runway so
that the angle information from the tripod and digitised coordinates of the
foot can be combined with the previously collected calibration file. The
only 2D panning algorithm that I can find is from Chow, J. (International
Journal of Sport Biomechanics: 1987, Vol 3. pp.110-127), although this
requires markers along the runway during competition. I am also aware of
systems using an instrumented tripod to provide real-time analysis (such as
used in swimming at the Australian Institute of Sport), however, these
require the athlete to be directly in the centre of the screen during the
whole pan. I have also searched through the Biomech-L archives for 2D
panning algorithms with no success. Any assistance would be greatly
appreciated. The address for replies is alyttle@wais.org.au and I will post
a summary of replies.
Many Thanks, Andrew Lyttle
Andrew Lyttle
Sports Biomechanist
Western Australian Institute of Sport
Stephenson Ave, Mt Claremont WA 6910
Tel: (08) 9387 8166
Fax: (08) 9383 7344
Email: alyttle@wais.org.au
---------------------------------------------------------------
To unsubscribe send SIGNOFF BIOMCH-L to LISTSERV@nic.surfnet.nl
For information and archives: http://isb.ri.ccf.org/biomch-l
---------------------------------------------------------------